Problemset - Codeforces

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bitmasks

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Problems

#	Name
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5419
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x331
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11991
1567B	MEXor Mixup bitmasks, greedy	1000	x22239
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x17273
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x19338
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x6022
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x29953
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8458
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6728
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8703
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12595
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x17586
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6869
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x16334
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7505
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5228
1527A	And Then There Were K bitmasks	800	x34787
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11722
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x18722
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x23833
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x14204
1498B	Box Fitting binary search, bitmasks, data structures, greedy	1300	x16558
1494B	Berland Crossword bitmasks, brute force, greedy, implementation	1400	x14117
1494A	ABC String bitmasks, brute force, implementation	900	x20617
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5997
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x7018
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6241
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7138
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x19014
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4292
1421A	XORwice bitmasks, greedy, math	800	x28140
1420B	Rock and Lever bitmasks, math	1200	x24659
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4298
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5263
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x13811
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x5054
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x18778
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4852
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x11457
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x17765
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x18731
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x12204
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7806
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8354
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x8084
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6596
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11898
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x16236
1303D	Fill The Bag bitmasks, greedy	1900	x7019
1288D	Minimax Problem binary search, bitmasks, dp	2000	x7006
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7586
1270C	Make Good bitmasks, constructive algorithms, math	1400	x13922
1225C	p-binary bitmasks, brute force, math	1600	x8861
1220D	Alex and Julian bitmasks, math, number theory	1900	x3858
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7357
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x2893
1207E	XOR Guessing bitmasks, interactive, math	1900	x5828
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6537
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x9130
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4648
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x8854
1151B	Dima and a Bad XOR bitmasks, brute force, constructive algorithms, dp	1600	x10920
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3636
1144E	Median String bitmasks, math, number theory, strings	1900	x4097
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x1950
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x27650
1095C	Powers Of Two bitmasks, greedy	1400	x16302
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x2794
1051D	Bicolorings bitmasks, dp	1700	x7300
1042B	Vitamins bitmasks, brute force, dp, implementation	1200	x15609
1030E	Vasya and Good Sequences bitmasks, dp	2000	x2996
1017D	The Wu bitmasks, brute force, data structures	1900	x3401
993B	Open Communication bitmasks, brute force	1900	x1936
981D	Bookshelves bitmasks, dp, greedy	1900	x3206
961C	Chessboard bitmasks, brute force, implementation	1400	x5262
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3896
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x3343
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1734
913C	Party Lemonade bitmasks, dp, greedy	1600	x7807
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11726
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3112
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5261
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6865
878A	Short Program bitmasks, constructive algorithms	1600	x5343
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4325
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4579
817E	Choosing The Commander bitmasks, data structures, trees	2000	x2765
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5135
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x3111
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2930
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x2285
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2263
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1711
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x14436
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x9715
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6333
611B	New Year and Old Property bitmasks, brute force, implementation	1300	x9936
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x3542
580D	Kefa and Dishes bitmasks, dp	1800	x9384